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5.Work, Energy, Power and Collision
easy
$300 g $ દળના પદાર્થનો વેગ $(3\hat i + 4\hat j)m/sec$ હોય,તો ગતિઊર્જા.....$J$
A
$1.35 $
B
$2.4 $
C
$3.75$
D
$7.35 $
Solution
$\vec v = (3\hat i + 4\hat j)$ $v = \sqrt {{3^2} + {4^2}} = 5\,m/s$.
$k =$ $\frac{1}{2}m{v^2} = \frac{1}{2} \times 0.3 \times {(5)^2} = 3.75\,J$
Standard 11
Physics
